Sek'Kuar, Deathkeeper + Warren Soultrader + Nether Traitor + Soul's Attendant

Sek'Kuar, Deathkeeper

Warren Soultrader

Nether Traitor

Soul's Attendant

How it works

1. Activate Warren Soultrader by sacrificing Nether Traitor and paying 1 life.
2. When Nether Traitor dies, Sek'Kuar triggers, creating a 3/1 Graveborn creature token.
3. When the Graveborn enters the battlefield, Soul's Attendant triggers, causing you to gain 1 life.
4. Resolve the Warren Soultrader ability, creating a Treasure token.
5. Activate the Treasure by tapping and sacrificing it, adding .
6. Activate Warren Soultrader by paying 1 life and sacrificing the Graveborn.
7. When the Graveborn dies, Nether Traitor triggers, causing you to pay to return Nether Traitor from your graveyard to the battlefield.
8. When Nether Traitor enters the battlefield, Soul's Attendant triggers, causing you to gain 1 life.
9. Resolve the Warren Soultrader ability, creating a Treasure token.
10. Repeat.

This self-sustaining loop turns a cozy graveyard into an endless engine of sacrifice and rebirth, fueled by Warren Soultrader's appetite and the mana from its resulting Treasures. Nether Traitor provides the recurring sacrifice fodder, jumping straight back from the graveyard using the black mana generated along the way, while Soul's Attendant safely offsets the life payment required by Warren Soultrader to keep the loop going. Meanwhile, Sek'Kuar, Deathkeeper watches the carnage unfold and spits out a hasty Graveborn token every time a nontoken creature dies, letting you alternate sacrifices and amass an infinite army of artifacts and triggers.